$mainFont:'Microsoft Yahei';
*{
    padding:0;
    margin:0;
    font-family:$mainFont;
}
.clear{
    width: 100%;
    height: 1px;
    clear: both;
    overflow: hidden;
}
.bold{
    font-weight: bold;
}
.gray{
    color: rgb(152,153,154);
}
